I like to use pure mineral oil. From the second it hits the wood it's safe. In fact, mineral oil is even sold at phamacies for human consumption. Other wood finishes can be safe once cured but few, if any, are safe before curing. As an added safety benefit, the mineral oil finish will not go rancid like other vegetable based oils often found in the kitchen.

Another benefit of mineral oil is that the finish is also easily repaired. Since it doesn't dry, there is no concern of chipping or flaking off.